On Tue, 22 Feb 2011, Schaefer Dr, Frank-Rene () wrote:Please do not top post.> We are using GPIO pins and map them to IRQ. How are the GPIO pins accessed ? Are they memory mapped registers or what ?> The underlying driver seems to use message signaled interrupts.That does not answer which driver is involved. W/o seing the code Ican't tell much.Thanks, tglx